Lightning-arrester.



` No. 882,096. PATBNTED MAR. 17, 1908;

F. P. CAUBLE.

LIGHTNING ARRBSTER.

APPLICATION FILED MAY3.1906.

JM @f/M@ BVM 5MM@ ERANKLlN. PIERCE CAUBLE, OF LINCOLNTON, NORTH CAROLINA.

LIGHTNING-ARRESTER.

No. 882,096. i

Specification of Letters Patent.

Patented March 17, 1908.

Application filed May 3 1906. Serial No. 315,020.

'To allihbm it may concern:

vup in the line,

Be itknown that I, FRANKLIN P. CAUBLE, acitizen of the United States, residing at Lincolnton, in the county of Lincoln and State of North Carolina, have invented new and useful Improvements in Lightning-Arresters, of which the following is a specification.

This invention is a lightning-arrester, and has for its object an improved apparatus of this kind embodying a choke-coil connected and an insulated grounded conductor arranged within the coil and having the multiplicity of oints extending in roximit thereto, to w ch the charge will ]ump an thus pass to the Ground.

In the accompanying rawing: Figure 1 is a Iplan-view ot the apparatus; Fig. 2 is a simi ar view with the cover remove Fig. 3 is a cross-sectional view on the line 3--3 oi Fig. 1; Fig. 4 is a longitudinal sectional view on the line 4-4 of Fig. 2, with the cover replaced.

Referring specifically to the drawing, 10'

denotes a casing having a base 11 from which extend transverse end-walls 12, and a central lo itudinal partition 13 connecting said en -walls. A cover is provided which comprises a top 14, ends 15 and sides 16, the latter of which extend down to the base and form the side-walls oi the casing. The endwalls 12 are spaced from the baseas at 17, and-.are also recessed at opposite ends as at 18 for a purpose to be hereinafter described. The ends 15 are also recessed as at 19 which recesses register with those at 18 whereby openings are formed in the end-walls of the casing through which. the iine wires enter.

Between kthe end-walls, the base has openings-20, and in the bottom of the base are transverse'grooves 21.` Extending from the sides 16 are bosses 22 having notches in which the screws er other securing devices, whereby the arrester is fastened to a support, are seated. The casing herein describe will be made of porcelain or other non-conducting material, and it contains and supports' the working parts of the. arrester to be hereinafter described.

At 23 are indicated a pair of spools which are made of porcelain or other non-conductmaterial, each spool having a central longitudinal opening 24 extending from end to end. The spools are also formed with a 4number of lo vitudinal slots 25 extending from the outsi e to the openings 24. The ends ofthe spools are square as shown at 26 to form' a support. The outside of the spools are formed with a spiral groove 27 in which the coils 28 are wound. Each o ening 24 contains a conductor 29, preferab y of carbon, and having radially-extending ribs 30 which fit in the slots 25.' The depth of the grooves 27 is such that the coils do not touch the ends of the ribs 30, thus leaving said endsexposed, and forming a ap between the coil and the ribs. The con uctors 29 contain a core 31 of magnetized iron or steel` which tends to cause the charge of lightning to jump with greater readiness from the coils to the conductors.

The ground wire is indicated at 32 being connected to a binding screw 33 located at one end of the base 11. Said binding screw is connected by a wire 34 to a second binding screw 35 at the other end of the base. The wire 34 extends through a groove 36 in the bottom of the base. The connection between the binding screws and the conductors 29 is b metal plates-37 secured to the base 11 by t e nuts 3S of the binding screws. The plates 37 extend under the end-walls 12 through vthe spaces 17 and into the casing, and are bent upwardly as at 39 into contact with the ends of the conductors 29, said ends extendingslightly beyond the ends of the spools. lNires 40 connected to the line Wires extend into the casing through the openings formed by the recesses 18 and 19, and are wound on the spools 23 to form the chokecoils, the same sized Awire being emplo ed. lf desired the line wires may be woun on the spools to form the coils whereby the arrester could .be applied directly to the line without cutting it.

The apparatus herein described can be used on grounded or metallic circuits. In

the former case, a single coil and grounded conductor only need be used, and the casing can beinade smaller to suit such form. The arrester will be secured to the cross-arm of the pole or other support, it being especially .designed for location outside of buildings,

of the ribs 30. The openings 20 and grooves 21 effectively serve to revent the parts from side of the spool; a grounded core in the 15 beeoming-smutted or isrupted, by allowing aforesaid bore, having radial ribs extending the blast or blow to escape through said into the slots with their outer edges s aeed openings. It is advisable, With lightning arfrom the out-side of the spool and a eo con# 5 resters used in 'outside Work,`that they be nected to the line7 and Wound on the spool protected by a Casing as nearly Water-tight out of Contact With the aforesaid ribs. 20 as possible, but nevertheless With outlets to In testimony whereof I have signed my prevent fracture or disruption of the parts name to this specification in the presence of by the discharge and the deposit of carbon or two subscribing Witnesses.

10 smut on the parts in the easing.

1 01mm FRANKLN. PIERCE CAUBLE. A lightning arrester com rising an insu- Witnesses: latingspool having en axia bore, and slots W. E. GRIGG. 

